There is asymmetry of the navicular bones with a small and sclerotic navicular on the left. Features here are of Kohler disease which is the epnonymous name given to avascular necrosis of the navicular.
The child presented with right foot pain. The abnormality here is on the left suggesting that it is asymptomatic and an incidental finding. No cause for right foot pain is demonstrated on these images.
The navicular may be dense during development, but with degree of asymmtry here is a help to diagnosis.